Eoad way construction



March 8, 1932. A. E. SCHUTTE ROADWAY CONSTRUCTION Filed March 1929 satisfactorily under normal conditions.

Patented 'lVlar. 8, 1932 STATES PATENT OFFICE ROADWAY CONSTRUCTION Application filed March 2, 1929.

The invention relates to a roadway or pavement essentially adapted for automobile traftie and made (if-bituminous or concrete material or such material as presents a relatively hard smooth surface. The invention pertains especially to the surface of the roadway or pavement.

As customarily made the relatively hard smooth surface presented by the roadway is I In case, however, the surface is wet and especially if oiled it becomes slippery and induces skidding of vehicles passing over it. A further difficulty is that the ordinary surface is a light-reflecting surface. This is very objectionable especially when the suns rays are so incident to the surface that the reflected rays will cause glare.

The object of the invention is to obviate in so far as possible the difficulties above referred to, and I have found that they may be largely overcome by making the surface of the roadway or pavement longitudinally corrugated, the corrugations being relatively fine and convex.

The construction can perhaps best be seen by reference to the drawings, in which Figure 1 is a cross section of such portion of a roadway or pavement as is necessary for l a proper understanding of the invention, and

Fig. 2 a plan of the roadway or pavement. Referring to the drawings: 1 represents the body of the roadway or rather the top portion thereof which presents thewearing or traction surface. The wearing surface is corrugated by parallel lines of relatively small convexities 2 the rounding surfaces of which meet to form crevices 3 between them. The parallel lines of convexwise the pavement.

j inwidth or lateral dimension. In other words, the corrugations are relatively fine considering the width of the roadway or pavement. They may be made inany suitable manner as by rolling the surface when formed with a roller the peripheral surface of which Serial No. 343,875.

is properly corrugated to effect the objective end.

With a pavement or roadway having a surface thus corrugated skidding by vehicles passing over it is essentially obviated even under adverse conditions. Such action for preventin skidding is further obtained on account or the fact that the corrugations lcn d themselves to receiving and holding deposits of sand or gravel lodging in the crevices 3 between the convexities and this also assists in preventing skidding. An example of such deposits is shown in Fig. 1 where i represents deposits of sand or gravel within the crevices between the convexities. This is quite in contrast to the common smoothfaced pavement where the surface is ordinarily swept clean.

A further advantage of the corrugations is that rays of reflected light from the surfac. of the pavement, which would produce glare with an ordinary smoothfaced surface, are dispersed for the most part by the corrugations and glare prevented. Sand or gravel lodging in the corrugated surface of the roadway in the crevices between its convexities also assists in dispersing rays of light.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States A roadway having a top wearing surface corrugated by parallellinesofrelativelysmall convexities running lengthwise the roadway and the rounding surfaces of which convexities meet to form sharp crevices between them.

AUGUST E. SCI-TUTTI 

